When we last left the Lethal Performance Shelby GT350 the car had received a 2.9-liter blower from Whipple Superchargers and developed over 819 horsepower and 600 lb-ft of torque. That was through the stock manifolds, a Lethal Performance mid-pipe and the stock cat-back system.

When you start pushing that much air through a high-winding engine like the Voodoo 5.2-liter engine, maximizing the airflow is crucial. Lethal started out by opening up the exhaust with a cat-back exhaust, but the time had come to open it all the way up by replacing the factory manifolds with full-fledged long-tube headers and a supporting exhaust from Kooks Headers and Exhaust.